feat: new notification provider: slack bot

internal/pkg/core/notifier/providers/slackbot/slackbot.go

@@ -0,0 +1,70 @@
+package discordbot
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	"github.com/go-resty/resty/v2"
+
+	"github.com/usual2970/certimate/internal/pkg/core/notifier"
+)
+
+type NotifierConfig struct {
+	// Slack Bot API Token。
+	BotToken string `json:"botToken"`
+	// Slack Channel ID。
+	ChannelId string `json:"channelId"`
+}
+
+type NotifierProvider struct {
+	config     *NotifierConfig
+	logger     *slog.Logger
+	httpClient *resty.Client
+}
+
+var _ notifier.Notifier = (*NotifierProvider)(nil)
+
+func NewNotifier(config *NotifierConfig) (*NotifierProvider, error) {
+	if config == nil {
+		panic("config is nil")
+	}
+
+	client := resty.New()
+
+	return &NotifierProvider{
+		config:     config,
+		logger:     slog.Default(),
+		httpClient: client,
+	}, nil
+}
+
+func (n *NotifierProvider) WithLogger(logger *slog.Logger) notifier.Notifier {
+	if logger == nil {
+		n.logger = slog.Default()
+	} else {
+		n.logger = logger
+	}
+	return n
+}
+
+func (n *NotifierProvider) Notify(ctx context.Context, subject string, message string) (res *notifier.NotifyResult, err error) {
+	// REF: https://docs.slack.dev/messaging/sending-and-scheduling-messages#publishing
+	req := n.httpClient.R().
+		SetContext(ctx).
+		SetHeader("Content-Type", "application/json").
+		SetHeader("Authorization", "Bearer "+n.config.BotToken).
+		SetBody(map[string]any{
+			"token":   n.config.BotToken,
+			"channel": n.config.ChannelId,
+			"text":    subject + "\n" + message,
+		})
+	resp, err := req.Post("https://slack.com/api/chat.postMessage")
+	if err != nil {
+		return nil, fmt.Errorf("slack api error: failed to send request: %w", err)
+	} else if resp.IsError() {
+		return nil, fmt.Errorf("slack api error: unexpected status code: %d, resp: %s", resp.StatusCode(), resp.String())
+	}
+
+	return &notifier.NotifyResult{}, nil
+}

internal/pkg/core/notifier/providers/slackbot/slackbot_test.go

@@ -0,0 +1,64 @@
+package discordbot_test
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"strings"
+	"testing"
+
+	provider "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/slackbot"
+)
+
+const (
+	mockSubject = "test_subject"
+	mockMessage = "test_message"
+)
+
+var (
+	fApiToken  string
+	fChannelId string
+)
+
+func init() {
+	argsPrefix := "CERTIMATE_NOTIFIER_SLACKBOT_"
+
+	flag.StringVar(&fApiToken, argsPrefix+"APITOKEN", "", "")
+	flag.StringVar(&fChannelId, argsPrefix+"CHANNELID", 0, "")
+}
+
+/*
+Shell command to run this test:
+
+	go test -v ./slackbot_test.go -args \
+	--CERTIMATE_NOTIFIER_SLACKBOT_APITOKEN="your-bot-token" \
+	--CERTIMATE_NOTIFIER_SLACKBOT_CHANNELID="your-channel-id"
+*/
+func TestNotify(t *testing.T) {
+	flag.Parse()
+
+	t.Run("Notify", func(t *testing.T) {
+		t.Log(strings.Join([]string{
+			"args:",
+			fmt.Sprintf("APITOKEN: %v", fApiToken),
+			fmt.Sprintf("CHANNELID: %v", fChannelId),
+		}, "\n"))
+
+		notifier, err := provider.NewNotifier(&provider.NotifierConfig{
+			BotToken:  fApiToken,
+			ChannelId: fChannelId,
+		})
+		if err != nil {
+			t.Errorf("err: %+v", err)
+			return
+		}
+
+		res, err := notifier.Notify(context.Background(), mockSubject, mockMessage)
+		if err != nil {
+			t.Errorf("err: %+v", err)
+			return
+		}
+
+		t.Logf("ok: %v", res)
+	})
+}